11211323009 has 2 divisors, whose sum is σ = 11211323010. Its totient is φ = 11211323008.

The previous prime is 11211323003. The next prime is 11211323051. The reversal of 11211323009 is 90032311211.

11211323009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8878915984 + 2332407025 = 94228^2 + 48295^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211323009 - 2²⁴ = 11194545793 is a prime.

It is a super-2 number, since 2×11211323009² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11211323003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605661504 + 5605661505.

It is an arithmetic number, because the mean of its divisors is an integer number (5605661505).

Almost surely, 2^11211323009 is an apocalyptic number.

It is an amenable number.

11211323009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211323009 is an equidigital number, since it uses as much as digits as its factorization.

11211323009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The spelling of 11211323009 in words is "eleven billion, two hundred eleven million, three hundred twenty-three thousand, nine".